Convert Kilometers to nautical miles
1 kilometer = 0.539957 nautical miles · nmi = km ÷ 1.852
When you need this conversion
This conversion goes from kilometers, the metric unit for road distances and travel, to nautical miles, the navigation unit used at sea and in aviation. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
Kilometers to nautical miles conversion table
| Kilometers (km) | Nautical miles (nmi) |
|---|---|
| 1 km | 0.539957 nmi |
| 2 km | 1.0799 nmi |
| 3 km | 1.6199 nmi |
| 5 km | 2.6998 nmi |
| 10 km | 5.3996 nmi |
| 15 km | 8.0994 nmi |
| 20 km | 10.7991 nmi |
| 25 km | 13.4989 nmi |
| 50 km | 26.9978 nmi |
| 75 km | 40.4968 nmi |
| 100 km | 53.9957 nmi |
| 250 km | 134.99 nmi |
| 500 km | 269.98 nmi |
| 1,000 km | 539.96 nmi |
The formula
nmi = km ÷ 1.852Because both units measure length, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Nautical miles to kilometers →Related length conversions
- Kilometers to meters
- Millimeters to micrometers
- Centimeters to inches
- Centimeters to feet
- Meters to kilometers
- Inches to centimeters
- Feet to centimeters
- Feet to yards
- Yards to feet
- Micrometers to millimeters
- Millimeters to nautical miles
- Centimeters to nautical miles
Frequently asked questions
- How many nautical miles are in a kilometer?
- There are 0.539957 nautical miles in 1 kilometer. The formula is nmi = km ÷ 1.852.
- How do you convert kilometers to nautical miles?
- Use the formula nmi = km ÷ 1.852. For example, 10 kilometers equals 5.3996 nautical miles.
- Is the kilometers to nautical miles conversion exact?
- Yes. Kilometers and nautical miles are both units of length, related by an exact defined factor. Displayed results are rounded for readability.
- What is km short for?
- km is the standard symbol for kilometer (also written as kilometres). nmi is the symbol for nautical mile.